Make sure you are filling the DIMM slots correctly by consulting the color coding on the DIMM slots if your motherboard supports dual-channel or quad-channel configurations. Setting Up Memory for Optimal Performance After memory modules have been succavaitoressfully installed into DIMM slots, BIOS/UEFI memory settings must be set up for optimal performance. Press a designated key (usually Del or F2) during startup to access the BIOS/UEFI setup. Navigate to the memory settings section of this interface to see information about the speed & timings of your installed RAM. Many contemporary motherboards have XMP (Extreme Memory Profile) support, which enables users to automatically adjust their memory settings according to manufacturer-defined profiles.